DOCS-11357 Remove mention of WiredTiger snapshotting after 2 GB of journal data

Author: Amar

source/includes/extracts-wired-tiger.yaml

@@ -168,7 +168,7 @@ content: |
 ---
 ref: wt-cache-default-setting
 content: |
-   
+
    Starting in 3.4, the WiredTiger internal cache, by default, will use
    the larger of either:
 
@@ -184,17 +184,15 @@ content: |
 ref: wt-snapshot-frequency
 content: |
    MongoDB configures WiredTiger to create checkpoints (i.e. write the
-   snapshot data to disk) at intervals of 60 seconds or 2 gigabytes of
-   journal data.
+   snapshot data to disk) at intervals of 60 seconds.
 ---
 ref: wt-journal-frequency
 content: |
    - .. versionadded:: 3.2
         Every 50 milliseconds.
 
    - MongoDB sets checkpoints to occur in WiredTiger on user data at an
-     interval of 60 seconds or when 2 GB of journal data has been written,
-     whichever occurs first.
+     interval of 60 seconds.
 
    - If the write operation includes a write concern of :writeconcern:`j:
      true <j>`, WiredTiger forces a sync of the WiredTiger journal files.